Touch Display Device

ABSTRACT

Provided is a touch display device. Because a shielding electrode, which is disposed in a non-active area and electrically coupled between a common electrode and a common voltage supply line, is located between a touch routing line and a signal line, the effects of noise caused by the signal line on the touch routing line may be reduced. Further, an encapsulation portion located on the shielding electrode has a planarized structure. The resulting maintenance of a certain distance between the shielding electrode and the touch routing line may reduce noise caused by the signal line from indirectly affecting the touch routing line through the shielding electrode.

CROSS REFERENCE TO RELATED APPLICATION

This application claims priority from Republic of Korea PatentApplication No. 10-2019-0107243, filed on Aug. 30, 2019, which is herebyincorporated by reference in its entirety.

BACKGROUND Field

Embodiments of the present disclosure relate to a touch display device.

Description of Related Art

Along with the development of the information society, demands fordisplay devices that display images are growing. In this regard, varioustypes of display devices, such as liquid crystal display (LCD) devicesand organic light emitting diode (OLED) display devices, have beenwidely used.

To provide more diverse functions to users, these display devicesprovide a function of recognizing a user's touch on a display panel andprocessing an input based on the recognized touch.

For example, a display device capable of touch recognition includes aplurality of touch electrodes disposed or built in a display panel, andmay detect the presence or absence of a user's touch and, if any,touched coordinates on the display panel by driving the touchelectrodes.

As the display panel provides a touch sensing function, while displayingan image, a line for display driving and a line for touch sensing may bearranged in the display panel. In some cases, the line for displaydriving and the line for touch sensing may overlap with each other ormay be arranged close to each other. Therefore, parasitic capacitancebetween the two lines may degrade the performance of touch sensing.

SUMMARY

Embodiments of the present disclosure provide a method of reducing noiseof a touch sensing signal, caused by parasitic capacitance between aline for display driving and a line for touch sensing in a non-activearea of a display panel.

According to an aspect, embodiments of the present disclosure provide atouch display device including an active area in which a plurality oflight emitting elements are disposed, a non-active area defined outsidethe active area, in which a plurality of signal lines are disposed, anencapsulation portion disposed in the active area and the non-activearea and located on the light emitting elements and the signal lines, aplurality of touch electrodes disposed in the active area on theencapsulation portion, a plurality of touch routing lines disposed inthe non-active area on the encapsulation portion and electricallycoupled to the touch electrodes, a shielding electrode located under theencapsulation portion in the non-active area, with at least a partthereof located on the signal lines, and electrically coupled to acommon electrode of the light emitting elements, and a common voltagesupply line located under the shielding electrode and electricallycoupled to the shielding electrode. At least one of the shieldingelectrode or the common voltage supply line is disposed in an areaincluding an area in which the touch routing lines overlap with thesignal lines in the non-active area.

At least one of the shielding electrode or the common voltage supplyline may be disposed in an area including an area in which the touchrouting lines overlap with the signal lines in the non-active area.

According to another aspect, embodiments of the present disclosureprovide a touch display device including an active area in which aplurality of light emitting elements are disposed, a non-active areadefined outside the active area, in which a plurality of signal linesare disposed, an encapsulation portion disposed in the active area andthe non-active area and located on the light emitting elements and thesignal lines, a plurality of touch electrodes disposed in the activearea on the encapsulation portion, a plurality of touch routing linesdisposed in the non-active area on the encapsulation portion andelectrically coupled to the touch electrodes, a first shieldingelectrode located under the encapsulation portion in the non-activearea, with at least a part thereof located on the signal lines, andelectrically coupled to a common electrode of the light emittingelements, and a second shielding electrode located outside the firstshielding electrode in the non-active area and separated from the firstshielding electrode.

According to embodiments of the present disclosure, an electrode orline, which is disposed in a non-active area of a display panel andsupplies a common voltage to a common electrode of light emittingelements disposed in an active area of the display panel, is positionedbetween a signal line for display driving and a touch routing line,thereby blocking noise caused by the signal line for display driving.

According to embodiments of the present disclosure, a touch routingline, which is positioned in an area free of a shielding electrode in anon-active area of a display panel, is disposed without overlapping witha signal line for display driving. Therefore, noise of a touch sensingsignal may be reduced, which is caused by the signal line for displaydriving in an area between the shielding electrode and a pad portion.

BRIEF DESCRIPTION OF DRAWINGS

The above and other objects, features, and advantages of the presentdisclosure will be more clearly understood from the following detaileddescription, taken in conjunction with the accompanying drawings, inwhich:

FIG. 1 is a schematic diagram illustrating the configuration of a touchdisplay device according to embodiments of the present disclosure;

FIG. 2 is a schematic diagram illustrating a display panel in the touchdisplay device according to embodiments of the present disclosure;

FIG. 3 is a diagram illustrating an exemplary built-in structure of atouch panel in the display panel according to embodiments of the presentdisclosure;

FIGS. 4 and 5 are diagrams illustrating exemplary types of touchelectrodes arranged in the display panel according to embodiments of thepresent disclosure;

FIG. 6 is a diagram illustrating an exemplary mesh-type touch electrodeillustrated in FIG. 5 according to embodiments of the presentdisclosure;

FIG. 7 is a simplified diagram illustrating the structure of a touchsensor in the display panel according to embodiments of the presentdisclosure;

FIG. 8 is a diagram illustrating exemplary implementation of thestructure of the touch sensor illustrated in FIG. 7 according toembodiments of the present disclosure;

FIG. 9 is a partial sectional view illustrating the display panel, takenalong line X-X′ illustrated in FIG. 8, according to embodiments of thepresent disclosure;

FIGS. 10 and 11 are diagrams illustrating exemplary cross-sectionstructures of the display panel, when the display panel includes a colorfilter according to embodiments of the present disclosure;

FIG. 12 is a diagram illustrating an exemplary plane structure of ashielding electrode disposed in the touch display device according toembodiments of the present disclosure;

FIGS. 13A, 13B, 14, and 15 are diagrams illustrating exemplarycross-section structures of the touch display device illustrated in FIG.12 in which a shielding electrode is disposed according to embodimentsof the present disclosure;

FIG. 16 is a diagram illustrating another exemplary cross-sectionstructure of the touch display device in which a shielding electrode isdisposed according to embodiments of the present disclosure;

FIG. 17 is a diagram illustrating another exemplary cross-sectionstructure of the touch display device in which a shielding electrode isdisposed according to embodiments of the present disclosure;

FIG. 18 is a diagram illustrating another exemplary cross-sectionstructure of the touch display device in which a shielding electrode isdisposed according to embodiments of the present disclosure; and

FIG. 19 is a diagram illustrating an exemplary cross-section structureof the touch display device illustrated in FIG. 18 in which a shieldingelectrode is disposed according to embodiments of the presentdisclosure.

DETAILED DESCRIPTION

In the following description of examples or embodiments of the presentinvention, reference will be made to the accompanying drawings in whichit is shown by way of illustration specific examples or embodiments thatcan be implemented, and in which the same reference numerals and signscan be used to designate the same or like components even when they areshown in different accompanying drawings from one another. Further, inthe following description of examples or embodiments of the presentinvention, detailed descriptions of well-known functions and componentsincorporated herein will be omitted when it is determined that thedescription may make the subject matter in some embodiments of thepresent invention rather unclear. The terms such as “including”,“having”, “containing”, “constituting”, “make up of”, and “formed of”used herein are generally intended to allow other components to be addedunless the terms are used with the term “only”. As used herein, singularforms are intended to include plural forms unless the context clearlyindicates otherwise.

Terms, such as “first”, “second”, “A”, “B”, “(A)”, or “(B)” may be usedherein to describe elements of the present invention. Each of theseterms is not used to define essence, order, sequence, or number ofelements etc., but is used merely to distinguish the correspondingelement from other elements.

When it is mentioned that a first element “is connected or coupled to”,“contacts or overlaps” etc. a second element, it should be interpretedthat, not only can the first element “be directly connected or coupledto” or “directly contact or overlap” the second element, but a thirdelement can also be “interposed” between the first and second elements,or the first and second elements can “be connected or coupled to”,“contact or overlap”, etc. each other via a fourth element. Here, thesecond element may be included in at least one of two or more elementsthat “are connected or coupled to”, “contact or overlap”, etc. eachother.

When time relative terms, such as “after”, “subsequent to”, “next”,“before”, and the like, are used to describe processes or operations ofelements or configurations, or flows or steps in operating, processing,manufacturing methods, these terms may be used to describenon-consecutive or non-sequential processes or operations unless theterm “directly” or “immediately” is used together.

In addition, when any dimensions, relative sizes etc. are mentioned, itshould be considered that numerical values for an elements or features,or corresponding information (e.g., level, range, etc.) include atolerance or error range that may be caused by various factors (e.g.,process factors, internal or external impact, noise, etc.) even when arelevant description is not specified. Further, the term “may” fullyencompasses all the meanings of the term “can”.

FIG. 1 is a diagram illustrating the system configuration of a touchdisplay device according to embodiments of the present disclosure.

Referring to FIG. 1, the touch display device according to theembodiments of the present disclosure may provide both an image displayfunction and a touch sensing function.

To provide the image display function, the touch display deviceaccording to the embodiments of the present disclosure may include adisplay panel DISP in which a plurality of data lines and a plurality ofgate lines are disposed, and a plurality of subpixels defined by theplurality of data lines and the plurality of gate lines are arranged, adata driving circuit DDC driving the plurality of data lines, a gatedriving circuit GDC driving the plurality of gate lines, and a displaycontroller DCTR controlling operations of the data driving circuit DDCand the gate driving circuit GDC.

Each of the data driving circuit DDC, the gate driving circuit GDC, andthe display controller DCTR may be implemented in one or more individualparts. In some cases, two or more of the data driving circuit DDC, thegate driving circuit GDC, and the display controller DCTR may beintegrated into one part. For example, the data driving circuit DDC andthe display controller DCTR may be implemented into one integratedcircuit (IC) chip.

To provide the touch sensing function, the touch display deviceaccording to the embodiments of the present disclosure may include atouch panel TSP including a plurality of touch electrodes, and a touchsensing circuit TSC supplying a touch driving signal to the touch panelTSP, detecting a touch sensing signal from the touch panel TSP, andsensing the presence or absence of a user's touch on the touch panel TSPor a touched position (touched coordinates) based on the detected touchsensing signal.

The touch sensing circuit TSC may include, for example, a touch drivingcircuit TDC supplying the touch driving signal to the touch panel TSPand detecting the touch sensing signal from the touch panel TSP, and atouch controller TCTR sensing the presence or absence of a user's touchon the touch panel TSP or a touched position (touched coordinates) basedon the touch sensing signal detected by the touch driving circuit TDC.

The touch driving circuit TDC may include a first circuit part supplyingthe touch driving signal to the touch panel TSP and a second circuitpart detecting the touch sensing signal from the touch panel TSP.

The touch driving circuit TDC and the touch controller TCTR may beimplemented as separate parts, or integrated into one part, when needed.

Each of the data driving circuit DDC, the gate driving circuit GDC, andthe touch driving circuit TDC may be implemented as one or more ICs, andconfigured as a chip on glass (COG) type, a chip on film (COF) type, ora tape carrier package (TCP) type from the perspective of electricalconnection to the display panel DISP. The gate driving circuit GDC mayalso be configured as a gate in panel (GIP) type.

Each of the circuit components DDC, GDC, and DCTR for display drivingand the circuit components TDC and TCTR for touch sensing may beimplemented as one or more individual parts. In some cases, one or moreof the circuit components DDC, GDC, and DCTR for display driving and oneor more of the circuit components TDC and TCTR for touch sensing mayfunctionally be integrated and thus implemented as one or more parts.

For example, the data driving circuit DDC and the touch driving circuitTDC may be integrated into one or more IC chips. When the data drivingcircuit DDC and the touch driving circuit TDC are integrated into two ormore IC chips, the IC chips may have a data driving function and a touchdriving function, respectively.

The touch display device according to embodiments of the presentdisclosure may be any of various types such as an OLED device and an LCDdevice. For the convenience of description, the following description isgiven in the context of the touch display device being an OLED device,by way of example. That is, although the display panel DISP may be anyof various types such as an OLED panel and an LCD panel, an OLED panelis taken below as an example of the display panel DISP, for theconvenience of description.

Further, the touch panel TSP may include a plurality of touch electrodesto which the touch driving signal may be applied or from which the touchsensing signal may be detected, and a plurality of touch routing linesthat couple the touch electrodes to the touch driving circuit TDC.

The touch panel TSP may be located outside the display panel DISP. Thatis, the touch panel TSP and the display panel DISP may be separatelyfabricated and then combined. This touch panel TSP is referred to as anexternal type or an add-on type.

In contrast, the touch panel TSP may be built in the display panel DISP.That is, when the display panel DISP is fabricated, a touch sensorstructure including the plurality of touch electrodes and the pluralityof touch routing lines of the touch panel TSP may be formed togetherwith electrodes and signal lines for display driving. This touch panelTSP is referred to as an internal type. For the convenience ofdescription, the touch panel TSP will be described as an internal type,by way of example.

FIG. 2 is a diagram schematically illustrating the display panel DISP inthe touch display device according to embodiments of the presentdisclosure.

Referring to FIG. 2, the display panel DISP may include an active areaAA in which an image is displayed and a non-active area NA definedoutside an outer boundary line BL of the active area AA.

A plurality of subpixels may be arranged and electrodes and signal linesfor display driving may be disposed in the active area AA of the displaypanel DISP.

Further, a plurality of touch electrodes for touch sensing and aplurality of touch routing lines electrically coupled to the touchelectrodes may be disposed in the active area AA of the display panelDISP. Accordingly, the active area AA may also be referred to as a touchsensing area in which touch sensing is possible.

Link lines extended from or electrically coupled to the signal linesdisposed in the active area AA and pads electrically coupled to the linklines may be disposed in the non-active area NA of the display panelDISP. The pads disposed in the non-active area NA may be bonded orelectrically coupled to the display driving circuits DDC, GDC, and soon.

Link lines extended from or electrically coupled to the touch routinglines disposed in the active area AA and pads electrically coupled tolink lines may be disposed in the non-active area NA of the displaypanel DISP. The pads disposed in the non-active area NA may be bonded orelectrically coupled to the touch driving circuit TDC.

In the non-active area NA, extensions of parts of outermost touchelectrodes among the plurality of touch electrodes disposed in theactive area AA may exist, or one or more electrodes (touch electrodes)formed of the same material as the plurality of touch electrodesdisposed in the active area AA may further be disposed.

That is, all of the plurality of touch electrodes disposed in thedisplay panel DISP may exist within the active area AA, a part (e.g.,the outermost touch electrodes) of the plurality of touch electrodesdisposed in the display panel DISP may exist in the non-active area NA,or a part (e.g., the outermost touch electrode) of the plurality oftouch electrodes disposed in the display panel DISP may exist across theactive area AA and the non-active area NA.

Referring to FIG. 2, the display panel DISP of the touch display deviceaccording to embodiments of the present disclosure may include a damarea DA in which a dam DAM is disposed to reduce the possibility ofcollapse of any layer (e.g., an encapsulation portion in the OLED panel)in the active area AA.

The dam area DA may be located at a boundary point between the activearea AA and the non-active area NA or at a point in the non-active areaNA outside the active area AA.

The dam DAM disposed in the dam area DA may surround the active area AAin all directions or may be disposed outside only one or more portions(e.g., one or more portions having a fragile layer) of the active areaAA.

The dam DAM disposed in the dam area DA may be a single interconnectedpattern or two or more disconnected patterns. Further, only a primarydam, two dams (the primary dam and a secondary dam), or three or moredams may be disposed in the dam area DA.

In the dam area DA, there may be only the primary dam in one direction,and both the primary dam and the secondary dam in another direction.

FIG. 3 is a diagram illustrating an exemplary built-in structure oftouch panel TSP in the display panel DISP according to embodiments ofthe present disclosure.

Referring to FIG. 3, a plurality of subpixels SP may be arranged on asubstrate SUB in the active area AA of the display panel DISP.

Each sub-pixel SP may include a light emitting element ED, a firsttransistor T1 driving the light emitting element ED, a second transistorT2 transmitting a data voltage VDATA to a first node N1 of the firsttransistor T1, and a storage capacitor Cst maintaining a constantvoltage for the duration of one frame.

The first transistor T1 may include the first node N1 to which the datavoltage VDATA may be applied, a second node N2 electrically coupled tothe light emitting element ED, and a third node N3 to which a drivingvoltage VDD is applied from a driving voltage line DVL. The first nodeN1 may be a gate node, the second node N2 may be a source node or adrain node, and the third node N3 may be the drain node or the sourcenode. The first transistor T1 is also referred to as a drivingtransistor driving the light emitting element ED.

The light emitting element ED may include a first electrode (e.g., ananode electrode), a light emitting layer, and a second electrode (e.g.,a cathode electrode). The first electrode may be electrically coupled tothe second node N2 of the first transistor T1, and a base voltage VSSmay be applied to the second electrode.

In the light emitting element ED, the light emitting layer may be anorganic light emitting layer containing an organic material. In thiscase, the light emitting element ED may be an OLED.

On and off of the second transistor T2 may be controlled by a scansignal SCAN applied through a gate line GL, and coupled between thefirst node N1 of the first transistor T1 and a data line DL. The secondtransistor T2 is also referred to as a switching transistor.

When the second transistor T2 is turned on by the scan signal SCAN, thedata voltage VDATA supplied from the data line DL is transferred to thefirst node N1 of the first transistor T1.

The storage capacitor Cst may be electrically coupled between the firstnode N1 and the second node N2 of the first transistor T1.

Each subpixel SP may have a 2T1C structure including two transistors T1and T2 and one capacitor Cst, as illustrated in FIG. 3. In some cases,the subpixel SP may further include one or more transistors or one ormore capacitors.

The storage capacitor Cst may be not a parasitic capacitor (e.g., Cgs orCgd) which is an internal capacitor between the first node N1 and thesecond node N2 of the first transistor T1, but an external capacitorintentionally designed to be outside the first transistor T1.

Each of the first transistor T1 and the second transistor T2 may be ann-type transistor or a p-type transistor.

As described before, circuit elements such as a light emitting elementED, two or more transistors T1 and T2, and one or more capacitors Cstare disposed on the display panel DISP. Since these circuit elements(especially, the light emitting element ED) are vulnerable to externalmoisture or oxygen, an encapsulation portion ENCAP may be disposed onthe display panel DISP to reduce external moisture or oxygen frompenetrating into the circuit elements (especially, the light emittingelement ED).

The encapsulation portion ENCAP may have a single layer or multiplelayers.

In the touch display device according to embodiments of the presentdisclosure, the touch panel TSP may be formed on the encapsulationportion ENCAP.

That is, the touch sensor structure with the plurality of touchelectrodes 1E, in the touch panel TSP may be disposed on theencapsulation ENCAP in the touch display device.

During touch sensing, the touch driving signal or the touch sensingsignal may be applied to the touch electrodes TE. Therefore, an electricpotential difference may be generated between the touch electrodes TEand the cathode electrodes disposed with the encapsulation portion ENCAPin between, thereby generating unnecessary parasitic capacitance duringtouch sensing. Since the parasitic capacitance may degrade touchsensitivity, the distance between the touch electrodes 1 and the cathodeelectrodes may be set to a predetermined value (e.g., 1 um) or more inconsideration of a panel thickness, a panel manufacturing process, anddisplay performance in order to reduce the parasitic capacitance. Forthis purpose, the thickness of the encapsulation portion ENCAP may beset to at least 1 μm.

FIGS. 4 and 5 are diagrams illustrating exemplary types of the touchelectrodes 1 disposed on the display panel DISP according to embodimentsof the present disclosure.

As illustrated in FIG. 4, each touch electrode TE disposed on thedisplay panel DISP may be a plate-shaped electrode metal without anopening. In this case, each touch electrode TE may be a transparentelectrode. That is, each touch electrode TE may be formed of atransparent electrode material so that light emitted from a plurality ofunderlying subpixels SP may be transmitted upward.

In contrast, as illustrated in FIG. 5, each touch electrode TE disposedon the display panel DISP may be an electrode metal EM with two or moreopenings OA through patterning into a mesh type.

The electrode metal EM corresponds to a substantial touch electrode TE,to which the touch driving signal is applied or in which the touchsensing signal is sensed.

As illustrated in FIG. 5, when each touch electrode TE, is an electrodemetal EM patterned into a mesh type, two or more openings OA may existin the area of the touch electrode TE.

Each of the two or more openings OA in each touch electrode 1 maycorrespond to light emitting areas of one or more subpixels SP. That is,the plurality of openings OA are paths through which light emitted froma plurality of underlying subpixels SP pass upward. The followingdescription is given with the appreciation that each touch electrode TEis a mesh-type electrode metal EM, by way of example for the convenienceof description.

The electrode metal EM corresponding to each touch electrode TE may belocated on a bank disposed in an area other than the light emittingareas of two or more subpixels SP.

A plurality of touch electrodes TE may be formed by forming a wideelectrode metal EM in a mesh type and then cutting the electrode metalEM into predetermined patterns which are electrically separated fromeach other.

The outline of the touch electrode TE may be shaped into a square suchas a diamond or a rhombus, or any other shape such as a triangle, apentagon, or a hexagon.

FIG. 6 is a diagram illustrating an example of the mesh-type touchelectrode TE of FIG. 5.

Referring to FIG. 6, there may be one or more dummy metals DM separatedfrom the mesh-type electrode metal EM in the area of each touchelectrode TE.

The electrode metal EM is a part corresponding to a substantial touchelectrode TE, to which the touch driving signal is applied or in whichthe touch sensing signal is sensed, whereas the dummy metals DM arepresent in the area of the touch electrode TE, to which the touchdriving signal is not applied and from which the touch sensing signal isnot detected. That is, the dummy metals DM may be electrically floatedmetals.

Therefore, the electrode metal EM may be electrically coupled to thetouch driving circuit TDC, whereas the dummy metals DM may not beelectrically coupled to the touch driving circuit TDC.

In the area of each touch electrode TE, one or more dummy metals DM mayexist, disconnected from the electrode metal EM.

Alternatively, one or more dummy metals DM may exist, disconnected fromthe electrode metal EM only in the area of each of some touch electrodes1B. That is, there may be no dummy metal DM in the areas of some touchelectrodes TE.

Regarding the role of the dummy metals DM, when only the electrode metalEM exists in a mesh type with no dummy metal DM in the area of a touchelectrode TE as illustrated in FIG. 5, the visibility problem that theoutline of the electrode metal EM appears on a screen may occur.

In contrast, when one or more dummy metals DM are present in the area ofthe touch electrode TE as illustrated in FIG. 6, the visibility problemthat the outline of the electrode metal EM appears on a screen may beprevented.

Further, the presence or absence of a dummy metal DM or the number ofdummy metals DM (a dummy metal ratio) may be adjusted for each touchelectrode 1B. The resulting adjustment of the magnitude of thecapacitance for each touch electrode TE may lead to improved touchsensitivity.

Some points of the electrode metal EM formed in the area of one touchelectrode TE may be cut to produce dummy metals DM. That is, theelectrode metal EM and the dummy metals DM may be formed of the samematerial in the same layer.

The touch display device according to embodiments of the presentdisclosure may sense a touch based on capacitance generated in the touchelectrodes TE.

For touch sensing, the touch display device according to embodiments ofthe present disclosure may adopt a mutual-capacitance-based touchsensing scheme or a self-capacitance-based touch sensing scheme as acapacitance-based sensing scheme.

In the mutual-capacitance-based touch sensing scheme, a plurality oftouch electrodes TE may be divided into driving touch electrodes(transmitting touch electrodes) to which the touch driving signal isapplied, and sensing touch electrodes (receiving touch electrodes) inwhich the touch sensing signal is detected and which generatecapacitance along with the driving touch electrodes.

In this mutual-capacitance-based touch sensing scheme, the touch sensingcircuit TSC may sense the presence or absence of a touch and/or touchedcoordinates based on a change in capacitance (mutual capacitance)between a driving touch electrode and a sensing touch electrodeaccording to the presence or absence of a pointer such as a finger or apen.

In the self-capacitance-based touch sensing scheme, each touch electrodeTE may function as both a driving touch electrode and a sensing touchelectrode. That is, the touch sensing circuit TSC may apply the touchdriving signal to at least one touch electrode 1B, detect a touchsensing signal through the touch electrode TE to which the touch drivingsignal is applied, and sense the presence or absence of a touch and/ortouched coordinates by determining a change in capacitance between apointer such as a finger or a pen and the touch electrode TE based onthe detected touch sensing signal. In the self-capacitance-based touchsensing scheme, there is no distinction between a driving touchelectrode and a sensing touch electrode.

As such, the touch display device according to embodiments of thepresent disclosure may sense a touch in the mutual-capacitance-basedtouch sensing scheme or the self-capacitance-based touch sensing scheme.However, for the convenience of description, the following descriptionis given with the appreciation that the touch display device performsmutual-capacitance-based touch sensing and has a touch sensor structurefor the mutual-capacitance-based touch sensing, by way of example.

FIG. 7 is a simplified diagram illustrating the touch sensor structureof the display panel DISP according to embodiments of the presentdisclosure, and FIG. 8 is a diagram illustrating an implementationexample of the touch sensor structure of FIG. 7.

Referring to FIG. 7, a touch sensor structure formutual-capacitance-based touch sensing may include a plurality ofX-touch electrode lines X-TEL and a plurality of Y-touch electrode linesY-TEL. The plurality of X-touch electrode lines X-TEL and the pluralityof Y-touch electrode lines Y-TEL are positioned on the encapsulationportion ENCAP.

The plurality of X-touch electrode lines X-TEL may be arranged in afirst direction, and the plurality of Y-touch electrode lines Y-TEL maybe arranged in a second direction different from the first direction.

In the present disclosure, the first direction and the second directionmay be different relative to each other. For example, the firstdirection may be an x-axis direction and the second direction may be ay-axis direction. On the contrary, the first direction may be the y-axisdirection and the second direction may be the x-axis direction. Further,the first direction and the second direction may or may not beorthogonal to each other. Further, rows and columns are relative to eachother, and thus may be exchanged according to a viewing point.

Each of the plurality of X-touch electrode lines X-TEL may include aplurality of X-touch electrodes X-TE electrically coupled to each other.Each of the plurality of Y-touch electrode lines Y-TEL may include aplurality of Y-touch electrodes Y-TE electrically coupled to each other.

The plurality of X-touch electrodes X-TE and the plurality of Y-touchelectrodes Y-TE are included in the plurality of touch electrodes TE andare different in roles (functions).

For example, the plurality of X-touch electrodes X-TE in each of theplurality of X-touch electrode lines X-TEL may be driving touchelectrodes, and the plurality of Y-touch electrodes Y-TE in each of theplurality of Y-touch electrode lines Y-TEL may be sensing touchelectrodes. In this case, each of the plurality of X-touch electrodelines X-TEL corresponds to a driving touch electrode line, and each ofthe plurality of Y-touch electrode lines Y-TEL corresponds to a sensingtouch electrode line.

On the contrary, the plurality of X-touch electrodes X-TE in each of theplurality of X-touch electrode lines X-TEL may be sensing touchelectrodes, and the plurality of Y-touch electrodes Y-TE in each of theplurality of Y-touch electrode lines Y-TEL may be driving touchelectrodes. In this case, each of the plurality of X-touch electrodelines X-TEL corresponds to a sensing touch electrode line, and each ofthe plurality of Y-touch electrode lines Y-TEL corresponds to a drivingtouch electrode line.

A touch sensor metal for touch sensing may include a plurality of touchrouting lines TL in addition to the plurality of X-touch electrode linesX-TEL and the plurality of Y-touch electrode lines Y-TEL.

The plurality of touch routing lines TL may include one or more X-touchrouting lines X-TL coupled to each of the plurality of X-touch electrodelines X-TEL, and one or more Y-touch routing lines Y-TL coupled to eachof the plurality of Y-touch electrode lines Y-TEL.

Referring to FIG. 8, each of the plurality of X-touch electrode linesX-TEL may include a plurality of X-touch electrodes X-TE disposed in thesame row (or column) and one or more X-touch electrode connection linesX-CL electrically coupling the plurality of X-touch electrodes X-TE toeach other. An X-touch electrode connection line X-CL coupling twoadjacent X-touch electrodes X-TE to each other may be a metal integratedwith the two adjacent X-touch electrodes X-TE (see FIG. 8) or a metalcoupled to the two adjacent X-touch electrodes X-TE through contactholes.

Each of the plurality of Y-touch electrode lines Y-TEL may include aplurality of Y-touch electrodes Y-TE disposed in the same column (orrow) and one or more Y-touch electrode connection lines Y-CLelectrically coupling the plurality of Y-touch electrodes Y-TE to eachother. A Y-touch electrode connection line Y-CL coupling two adjacentY-touch electrodes Y-TE to each other may be a metal integrated with thetwo adjacent Y-touch electrodes Y-TE or a metal coupled to the twoadjacent Y-touch electrodes Y-TE through contact holes (see FIG. 8).

In this case, the X-touch electrode connection lines X-CL and theY-touch electrode connection lines Y-CL may intersect in the areas(touch electrode line intersections) where the X-touch electrode linesX-TEL and the Y-touch electrode lines Y-TEL intersect.

When the X-touch electrode connection lines X-CL and the Y-touchelectrode connection lines Y-CL intersect in the touch electrode lineintersections in this manner, the X-touch electrode connection linesX-CL and the Y-touch electrode connection lines Y-CL should be locatedin different layers.

Therefore, the plurality of X-touch electrodes X-TE, the plurality ofX-touch electrode connection lines X-CL, the plurality of Y-touchelectrodes Y-TE, and the plurality of Y-touch electrode connection linesY-CL may be located in two or more layers, so that the plurality ofX-touch electrode lines X-TEL may intersect the plurality of Y-touchelectrode lines Y-TEL.

Referring to FIG. 8, each of the plurality of X-touch electrode linesX-TEL is electrically coupled to a corresponding X-touch pad X-TPthrough one or more X-touch routing lines X-TL. That is, the outermostone of the plurality of X-touch electrodes X-TE included in one X-touchelectrode line X-TEL is electrically coupled to a corresponding X-touchpad X-TP.

Each of the plurality of Y-touch electrode lines Y-TEL is electricallycoupled to a corresponding Y-touch pad Y-TP through one or more Y-touchrouting lines Y-TL. That is, the outermost one of the plurality ofY-touch electrodes Y-TE included in one Y-touch electrode line Y-TEL iselectrically coupled to a corresponding Y-touch pad Y-TP.

As illustrated in FIG. 8, the plurality of X-touch electrode lines X-TELand the plurality of Y-touch electrode lines Y-TEL may be disposed onthe encapsulation portion ENCAP. That is, the plurality of X-touchelectrodes X-TE and the plurality of X-touch electrode connection linesX-CL included in the plurality of X-touch electrode lines X-TEL may bedisposed on the encapsulation portion ENCAP. The plurality of Y-touchelectrodes Y-TE and the plurality of Y-touch electrode connection linesY-CL included in the plurality of Y-touch electrode lines Y-TEL may bedisposed on the encapsulation portion ENCAP.

As illustrated in FIG. 8, each of the plurality of X-touch routing linesX-TL electrically coupled to the plurality of X-touch electrode linesX-TEL may be disposed on the encapsulation portion ENCAP and extendedeven to a place free of the encapsulation portion ENCAP to beelectrically coupled to a plurality of X-touch pads X-TP. Each of theplurality of Y-touch routing lines Y-TL electrically coupled to theplurality of Y-touch electrode lines Y-TEL may be disposed on theencapsulation portion ENCAP and extended even to a place free of theencapsulation portion ENCAP to be electrically coupled to a plurality ofY-touch pads Y-TP. The encapsulation portion ENCAP may be located withinthe active area AA, and in some cases, may be extended to the non-activearea NA.

As described before, the dam area DA may exist in the boundary areabetween the active area AA and the non-active area or in the non-activearea NA outside the active area AA in order to prevent collapse of anylayer (e.g., the encapsulation portion in the OLED panel) in the activearea AA.

As illustrated in FIG. 8, for example, a primary dam DAM1 and asecondary dam DAM2 may be disposed in the dam area DA. The secondary damDAM2 may be located more outward than the primary dam DAM1.

Unlike the example of FIG. 8, only the primary dam DAM1 may be locatedin the dam area DA. In some cases, one or more additional dams as wellas the primary dam DAM1 and the secondary dam DAM2 may be disposed inthe dam area DA.

Referring to FIG. 8, the encapsulation portion ENCAP may be located on aside surface of the primary dam DAM1, or both side and top surfaces ofthe primary dam DAM1.

FIG. 9 is a partial cross-sectional view of the display panel DISPaccording to embodiments of the present disclosure, taken along lineX-X′ illustrated in FIG. 8. While a touch electrode TE is shown asshaped into a plate in FIG. 9, this is merely an example, and the touchelectrode TE, may be a mesh type. In addition, when the touch electrodeTE, is a mesh type, an opening OA of the touch electrode TE may bepositioned on the light emitting area of a subpixel SP.

The driving transistor, that is, the first transistor T1 of eachsubpixel SP in the active area AA is disposed on the substrate SUB.

The first transistor T1 includes a first node electrode NE1corresponding to a gate electrode, a second node electrode NE2corresponding to a source electrode or a drain electrode, a third nodeelectrode NE3 corresponding to the drain electrode or the sourceelectrode, and a semiconductor layer SEMI.

The first node electrode NE1 and the semiconductor layer SEMI mayoverlap with each other, with a gate insulation layer GI interposedtherebetween. The second node electrode NE2 may be formed on aninsulation layer INS to contact one side of the semiconductor layerSEMI, and the third node electrode NE3 may be formed on the insulationlayer INS to contact the other side of the semiconductor layer SEMI.

A light emitting element ED may include a first electrode E1corresponding to an anode electrode (or cathode electrode), a lightemitting layer EL formed on the first electrode E1, and a secondelectrode E2 corresponding to a cathode electrode (or anode electrode)formed on the light emitting layer EL.

The first electrode E1 is electrically coupled to the second nodeelectrode NE2 of the first transistor T1, which is exposed through apixel contact hole penetrating through a planarization layer PLN.

The light emitting layer EL is formed on the first electrode E1 in alight emitting area defined by banks BANK. The light emitting layer ELis formed by stacking a hole-related layer, a light emitting layer, andan electron-related layer in this order or reverse order on the firstelectrode E1. The second electrode E2 is formed to oppose the firstelectrode E1, with the light emitting layer EL interposed therebetween.

The encapsulation portion ENCAP blocks penetration of external moistureor oxygen into the light emitting element ED vulnerable to the externalmoisture or oxygen.

The encapsulation portion ENCAP may be made up of a single layer or aplurality of layers PAS1, PCL, and PAS2 as illustrated in FIG. 9.

For example, when the encapsulation portion ENCAP is made up of theplurality of layers PAS1, PCL, and PAS2, the encapsulation portion ENCAPmay include one or more inorganic encapsulation layers PAS1 and PAS2 andone or more organic encapsulation layers PCL. In a specific example, theencapsulation portion ENCAP may be a sequential stack of the firstinorganic encapsulation layer PAS1, the organic encapsulation layer PCL,and the second inorganic encapsulation layer PAS2 in this order.

The organic encapsulation layer PCL may further include at least oneorganic encapsulation layer or at least one inorganic encapsulationlayer.

The first inorganic encapsulation layer PAS1 is formed closest to thelight emitting element ED on the substrate SUB on which the secondelectrode E2 corresponding to the cathode electrode is formed. The firstinorganic encapsulation layer PAS1 is formed of, for example, aninorganic insulation material allowing low-temperature deposition suchas silicon nitride (SiNx), silicon oxide (SiOx), silicon oxynitride(SiON), or aluminum oxide (Al2O3). Since the first inorganicencapsulation layer PAS1 is deposited in a low-temperature atmosphere,the first inorganic encapsulation layer PAS1 may prevent damage to thelight emitting layer EL containing an organic material vulnerable to ahigh temperature atmosphere in the deposition process.

The organic encapsulation layer PCL may be formed over a smaller areathan the first inorganic encapsulation layer PAS1. In this case, theorganic encapsulation layer PCL may be formed to expose both ends of thefirst inorganic encapsulation layer PAS1. The organic encapsulationlayer PCL may serve as a buffer for alleviating stress between layers,caused by bending of the touch display device, which is an OLED device,and may serve to enhance planarization performance. The organicencapsulation layer PCL may be formed of, for example, an organicinsulation material such as acrylic resin, epoxy resin, polyimide,polyethylene, or silicon oxycarbon (SiOC).

When the organic encapsulation layer PCL is formed in an inkjet scheme,one or more dams DAM may be formed in the dam area DA corresponding to aboundary area between the non-active area NA and the active area AA or apartial area of the non-active area NA.

For example, as illustrated in FIG. 9, the dam area DA may be positionedbetween the active area AA and a pad area in which the plurality ofX-touch pads X-TP and the plurality of Y-touch pads Y-TP are formed inthe non-active area NA. The primary dam DAM1 adjacent to the active areaAA and the secondary dam DAM2 adjacent to the pad area may exist in thedam area DA.

When the organic encapsulation layer PCL in a liquid form is dropped inthe active area AA, the one or more dams DAM disposed in the dam area DAmay reduce collapsing of the organic encapsulation layer PCL in theliquid in the direction of the non-active area NA and thus invading thepad area.

The presence of the primary dam DAM1 and the secondary dam DAM2 asillustrated in FIG. 9 may enhance this effect.

The primary dam DAM1 and/or the secondary dam DAM2 may be formed in asingle-layer or multi-layer structure. For example, the primary dam DAM1and/or the secondary dam DAM2 may be simultaneously formed of the samematerial as at least one of a bank BANK or a spacer (not shown). In thiscase, the dam structure may be formed without an additional mask processand a cost increase.

Further, the primary dam DAM1 and/or the secondary dam DAM2 may beformed in a structure in which the first inorganic encapsulation layerPAS1 and/or the second inorganic encapsulation layer PAS2 is stacked onthe banks BANK, as illustrated in FIG. 9.

Further, the organic encapsulation layer PCL containing an organicmaterial may be located only on the inner side surface of the primarydam DAM1 as illustrated in FIG. 9.

Alternatively, the organic encapsulation layer PCL containing theorganic material may be located on at least a part of each of theprimary dam DAM1 and the secondary dam DAM2. For example, the organicencapsulation layer PCL may be located on top of the primary dam DAM1.

The second inorganic encapsulation layer PAS2 may be formed on thesubstrate SUB with the organic encapsulation layer PCL formed thereon,to cover the top surface and a side surface of each of the organicencapsulation layer PCL and the first inorganic encapsulation layerPAS1. The second inorganic encapsulation layer PAS2 reduces or blockspenetration of external moisture or oxygen into the first inorganicencapsulation layer PAS1 and the organic encapsulation layer PCL. Thesecond inorganic encapsulation layer PAS2 is formed of, for example, aninorganic insulation material such as silicon nitride (SiNx), siliconoxide (SiOx), silicon oxynitride (SiON), or aluminum oxide (Al₂O₃).

A touch buffer film T-BUF may be disposed on the encapsulation portionENCAP. The touch buffer film T-BUF may be interposed between the touchsensor metal including the X-touch and Y-touch electrodes X-TE, and Y-TEand the X-touch and Y-touch electrode connection lines X-CL and Y-CL andthe second electrode E2 of the light emitting element ED.

The touch buffer film T-BUF may be designed such that the distancebetween the touch sensor metal and the second electrode E2 of the lightemitting element ED is maintained to be a predetermined minimum value(e.g., 1 μm). Accordingly, parasitic capacitance formed between thetouch sensor metal and the second electrode E2 of the light emittingelement ED may be reduced or prevented, thereby preventing a decrease intouch sensitivity which might otherwise be caused by the parasiticcapacitance.

Without the touch buffer film T-BUF, the touch sensor metal includingthe X-touch and Y-touch electrodes X-TE and Y-TE and the X-touch andY-touch electrode connection lines X-CL and Y-CL may be disposed on theencapsulation portion ENCAP.

Further, the touch buffer film T-BUF may block penetration of a chemicalsolution (e.g., developer or etchant) used in a manufacturing process ofthe touch sensor metal disposed on the touch buffer film T-BUF orexternal moisture into the light emitting layer EL containing an organicmaterial. Accordingly, the touch buffer film T-BUF may prevent damage tothe light emitting layer EL vulnerable to a chemical solution ormoisture.

The touch buffer film T-BUF may be formed at a low temperature equal toor lower than a certain temperature (e.g., 100° C.) to reduce damage tothe light emitting layer EL containing an organic material vulnerable tohigh temperature, and is formed of an organic insulation material havinga low dielectric constant of 1 to 3. For example, the touch buffer filmT-BUF may be formed of an acrylic-based, epoxy-based, or siloxane-basedmaterial. The touch buffer film T-BUF of an organic insulating material,which has planarization performance, may reduce damage to each of theencapsulation layers PAS1, PCL, and PAS2 in the encapsulation portionENCAP and cracks of the touch sensor metal formed on the touch bufferfilm T-BUF which might otherwise be caused by bending of the OLEDdevice.

According to the mutual-capacitance-based touch sensor structure, theX-touch electrode lines X-TEL and the Y-touch electrode lines Y-TEL maybe disposed on the touch buffer film T-BUF, crossing each other.

The Y-touch electrode lines Y-TEL may include a plurality of Y-touchelectrodes Y-TE and a plurality of Y-touch electrode connection linesY-CL that electrically couple between the plurality of Y-touchelectrodes Y-TE.

As illustrated in FIG. 9, the plurality of Y-touch electrodes Y-TE andthe plurality of Y-touch electrode connection lines Y-CL are disposed ondifferent layers with a touch insulation film ILD therebetween.

The plurality of Y-touch electrodes Y-TE may be spaced from each otherat regular intervals along the y-axis direction. Each of the pluralityof Y-touch electrodes Y-1B may be electrically coupled to anotherY-touch electrode Y-TE adjacent in the y-axis direction through aY-touch electrode connection line Y-CL.

Each Y-touch electrode connection line Y-CL may be formed on the touchbuffer film T-BUF and exposed through touch contact holes penetratingthrough the touch insulation film ILD, and may be electrically coupledto two adjacent Y touch electrodes Y-TE in the y-axis direction.

The Y-touch electrode connection line Y-CL may be disposed to overlapwith a bank BANK. Accordingly, it is possible to prevent the Y-touchelectrode connection line Y-CL from decreasing an aperture ratio.

The X-touch electrode lines X-TEL may include a plurality of X-touchelectrodes X-TE and a plurality of X-touch electrode connection linesX-CL that electrically couple between the plurality of X-touchelectrodes X-TE. The plurality of X-touch electrodes X-TE and theplurality of X-touch electrode connection lines X-CL are disposed ondifferent layers with the touch insulation layer ILD therebetween.

The plurality of X-touch electrodes X-TE may be spaced from each otherat regular intervals along the x-axis direction on the touch insulationfilm ILD. Each of the plurality of X-touch electrodes X-TE may beelectrically coupled to another X-touch electrode X-TE adjacent in thex-axis direction through a X-touch electrode connection line X-CL.

Each X-touch electrode connection line X-CL may be disposed on the sameplane as the X-touch electrodes X-TE, and electrically coupled to orintegrated with two adjacent X touch electrodes X-TE in the x-axisdirection, without contact holes.

The X-touch electrode connection line X-CL may be disposed to overlapwith a bank BANK. Accordingly, it is possible to prevent the X-touchelectrode connection line X-CL from decreasing an aperture ratio.

The Y-touch electrode lines Y-TEL may be electrically coupled to thetouch driving circuit TDC through the Y-touch routing lines Y-TL and theY-touch pads Y-TP Similarly, the X-touch electrode lines X-TEL may beelectrically coupled to the touch driving circuit TDC through theX-touch routing lines X-TL and the X-touch pads X-TP.

A pad cover electrode may be further disposed to cover the X-touch padsX-TP and the Y-touch pads Y-TP.

The X-touch pads X-TP may be formed separately from the X-touch routinglines X-TL, or may be extended from the X-touch routing lines X-TL. TheY-touch pads Y-TP may be formed separately from the Y-touch routinglines Y-TL, or may be extended from the Y-touch routing lines Y-TL.

When the X-touch pads X-TP are extended from the X-touch routing linesX-TL, and the Y-touch pads Y-TP are extended from the Y-touch routinglines Y-TL, the X-touch pads X-TP, the X-touch routing lines X-TL, theY-touch pads Y-TP, and the Y-touch routing lines Y-TL may be formed ofthe same first conductive material. The first conductive material may bea metal having good corrosion resistance, acid resistance, andconductivity, such as Al, Ti, Cu, and Mo, which may be formed into asingle layer or multiple layers.

For example, the X-touch pads X-TP, the X-touch routing lines X-TL, theY-touch pads Y-TP, and the Y-touch routing lines Y-TL may be formed ofthe first conductive material in a 3-layer stack such as Ti/Al/Ti orMo/Al/Mo.

The pad cover electrode that may cover the X-touch pads X-TP and theY-touch pads Y-TP may be formed of the same second conductive materialas the X-touch and Y-touch electrodes X-TE and Y-TE. The secondconductive material may be a transparent conductive material such as ITOor IZO having strong corrosion resistance and acid resistance. The padcover electrode may be formed to be exposed by the touch buffer filmT-BUF to be bonded to the touch driving circuit TDC or a circuit film onwhich the touch driving circuit TDC is mounted.

The touch buffer film T-BUF may be formed to cover the touch sensormetal, thereby reducing corrosion of the touch sensor metal by externalmoisture or the like. For example, the touch buffer film T-BUF may beformed of an organic insulation material, or may be a circularpolarization plate or an epoxy or acrylic film. The touch buffer filmT-BUF may not exist on the encapsulation portion ENCAP. That is, thetouch buffer film T-BUF may not be an essential component.

The Y-touch routing lines Y-TL may be electrically coupled to theY-touch electrodes Y-TE through touch routing line contact holes orintegrated with the Y-touch electrodes Y-TE.

The Y-touch routing lines Y-TL may be extended to the non-active areaNA, pass the top and side surfaces of the encapsulation portion ENCAPand the top and side surfaces of the dam DAM, and be electricallycoupled to the Y-touch pads Y-TP. Accordingly, the Y-touch routing linesY-TL may be electrically coupled to the touch driving circuit TDCthrough the Y-touch pads Y-TP.

The Y-touch routing lines Y-TL may transfer the touch sensing signalreceived from the Y-touch electrodes Y-TE, to the touch driving circuitTDC or the touch driving signal received from the touch driving circuitTDC to the Y-touch electrodes Y-TE.

The X-touch routing lines X-TL may be electrically coupled to theX-touch electrodes X-TE through touch routing line contact holes orintegrated with the X-touch electrodes X-TE.

The X-touch routing lines X-TL may be extended to the non-active areaNA, pass the top and side surfaces of the encapsulation portion ENCAPand the top and side surfaces of the dam DAM, and be electricallycoupled to the X-touch pads X-TP. Accordingly, the X-touch routing linesX-TL may be electrically coupled to the touch driving circuit TDCthrough the X-touch pads X-TP.

The X-touch routing lines X-TL may transfer the touch driving signalreceived from the touch driving circuit TDC to the X-touch electrodesX-TE, and the touch sensing signal received from the X-touch electrodesX-TE to the touch driving circuit TDC.

The arrangement of the X-touch routing lines X-TL and the Y-touchrouting lines Y-TL may be changed in various manners according to apanel design.

A touch protection film PAC may be disposed on the X-touch electrodesX-TE and the Y-touch electrodes Y-TE. The touch protection film PAC maybe extended to before or after the dam DAM and thus disposed on theX-touch routing lines X-TL and the Y-touch routing lines Y-TL.

The cross-sectional view of FIG. 9 conceptually illustrates thestructure. The position, thickness, or width of each pattern (each layeror electrode) may vary according to a viewing direction or location, theconnection structures of various patterns may also be changed, and alayer may be added to, omitted from, or integrated with the illustratedlayers. For example, the width of a bank BANK may be narrower than shownin the drawing, and the height of the dam DAM may be lower or higherthan shown in the drawing. Further, the cross-sectional view of FIG. 9illustrates the structure in which a touch electrode TE and a touchrouting line TL are disposed on the entirety of a subpixel SP, in orderto show an exemplary structure connected to a touch pad TP along theinclined surfaces of the touch routing wire TL and the encapsulationportion ENCAP. However, when the touch electrode TE is theafore-mentioned mesh type, an opening OA of the touch electrode TE maybe positioned on the light emitting area of the subpixel SP. Further, acolor filter CF may be further disposed on the encapsulation portionENCAP. The color filter CF may be positioned on the touch electrodes TE,or between the encapsulation portion ENCAP and the touch electrodes TE.

FIGS. 10 and 11 are diagrams illustrating exemplary cross-sectionalstructures of the display panel DISP, when the display panel DISPincludes the color filter CF according to embodiments of the presentdisclosure.

Referring to FIGS. 10 and 11, when the touch panel TSP is built in thedisplay panel DISP, and the display panel DISP is implemented as an OLEDpanel, the touch panel TSP may be positioned on the encapsulationportion ENCAP in the display panel DISP. In other words, the touchsensor metal including the plurality of touch electrodes TE and theplurality of touch routing lines TL may be positioned on theencapsulation portion ENCAP in the display panel DISP.

As described before, as the touch electrodes TE, are formed on theencapsulation portion ENCAP, the touch electrodes TE, may be formedwithout significantly affecting display performance and display-relatedlayer formation.

Referring to FIGS. 10 and 11, the second electrode E2, which may be acathode electrode of an OLED, may be positioned under the encapsulationportion ENCAP.

The thickness T of the encapsulation portion ENCAP may be, for example,1 micrometer or more.

As described before, parasitic capacitance generated between the secondelectrode E2 of the OLED and a touch electrode TE may be reduced bysetting the thickness of the encapsulation portion ENCAP to 1 micrometeror more. Accordingly, it is possible to reduce a decrease in touchsensitivity, caused by parasitic capacitance.

As described above, in each of the plurality of touch electrodes TE, theelectrode metal EM is patterned into a mesh with two or more openingsOA, and each of the two or more openings OA may correspond to one ormore subpixels or the light emitting areas of the one or more subpixels,when viewed from the vertical direction.

As described above, the electrode metal EM of the touch electrode TE maybe patterned such that when viewed from a plane, the light emittingareas of one or more subpixels exist in correspondence with the positionof each of two or more openings OA present in the area of the touchelectrode TE. Therefore, the light emitting efficiency of the displaypanel DISP may be increased.

As illustrated in FIGS. 10 and 11, black matrices BM may be disposed onthe display panel DISP, and color filters CF may be further disposed onthe display panel DISP.

The positions of the black matrices BM may correspond to those of theelectrode metals EM of the touch electrodes TE.

The positions of a plurality of color filters CF correspond to thepositions of a plurality of touch electrodes TE or the electrode metalsEM of the plurality of touch electrodes 1B.

As described above, since the plurality of color filters CF are locatedat positions corresponding to the positions of a plurality of openingsOA, the light emission performance of the display panel DISP may beimproved.

The vertical positional relationship between the plurality of colorfilters CF and the plurality of touch electrodes TE is described below.

As illustrated in FIG. 10, the plurality of color filters CF and theblack matrices BM may be positioned on the plurality of touch electrodesTE.

In this case, the plurality of color filters CF and the black matricesBM may be positioned on an overcoat layer OC disposed on the pluralityof touch electrodes TE. The overcoat layer OC may be identical to ordifferent from the touch protection film PAC illustrated in FIG. 9.

Alternatively, as illustrated in FIG. 11, the plurality of color filtersCF and the black matrices BM may be positioned under the plurality oftouch electrodes TE.

In this case, the plurality of touch electrodes TE may be located on theovercoat layer OC disposed on the color filters CF and the blackmatrices BM. The overcoat layer OC may be identical to or different fromthe touch buffer film T-BUF or the touch insulation film ILD illustratedin FIG. 9. Alternatively, the touch buffer film T-BUF or the touchinsulation film ILD may be disposed separately from the overcoat layerOC.

Since the vertical positional relationship between the touch electrodesTE and the components for display driving is adjusted in this manner,the components for touch sensing may be arranged without degradingdisplay performance.

As the touch electrodes TE and the lines are disposed on the electrodesand lines for display driving, the components for display driving mayaffect the touch sensing performance.

Embodiments of the present disclosure provide a method of arrangingcomponents for touch sensing without degrading display performance, anda method of preventing components for display driving from degradingtouch sensing performance.

FIG. 12 is a diagram illustrating an exemplary plane structure of thetouch display device in which a shielding electrode SE is disposedaccording to embodiments of the present disclosure.

Referring to FIG. 12, a plurality of touch electrodes TE may be disposedin the active area AA, and a plurality of touch routing lines TL coupledto the touch electrodes TE may be disposed in the non-active area NAdefined outside the active area AA on the display panel DISP.

As described before, the touch electrodes TE and the touch routing linesTL may be disposed on the encapsulation portion ENCAP.

Further, electrodes or lines for display driving may be disposed underthe encapsulation portion ENCAP, and a plurality of signal lines SL towhich a signal for display driving is applied may be arranged in thenon-active area NA.

The signal lines SL may be lines that supply the data voltage VDATAoutput from the data driving circuit DDC for driving subpixels SP, orlines that supply the driving voltage VDD. Alternatively, the signallines SL may be lines (e.g., clock lines) that supply an input signal toa circuit such as the gate driving circuit GDC.

The signal lines SL may be coupled to, for example, the data drivingcircuit DDC, and the data driving circuit DDC may be coupled to aflexible printed circuit FPC through link lines LL. Also, the touchsensing circuit TSC may be disposed on the flexible printed circuit FPC.Accordingly, the touch routing lines TL may be connected to the flexibleprinted circuit FPC and to the touch sensing circuit TSC.

The signal lines SL may be disposed without overlapping with the touchrouting lines TL in the non-active area NA to prevent noise duringdetection of the touch sensing signal through the touch routing linesTL.

The signal lines SL may be coupled to the data driving circuit DDC, andthe touch routing lines TL may be coupled to a pad portion, to becoupled to the touch sensing circuit TSC. As the lines gather to the padportion, there may be a part over which the signal lines SL and thetouch routing lines TL overlap with each other.

For example, as illustrated in FIG. 12, the signal lines SL and thetouch routing lines TL may not overlap with each other in a firstnon-active area NA1 adjacent to the active area AA in an area betweenthe active area AA and the driving circuit.

On the other hand, as the signal lines SL and the touch routing lines TLgather to be coupled to the pad portion, there may be a part over whichthe signal lines SL and the touch routing lines TL may overlap with eachother in a second non-active area NA2 with the pad portion locatedtherein, which is adjacent to the driving circuit.

The touch display device according to embodiments of the presentdisclosure may include a shielding electrode SE disposed between a layeron which the signal lines SL are disposed and a layer on which the touchrouting lines TL are disposed in the non-active area NA in order toreduce noise of the touch sensing signal which might otherwise be causedby parasitic capacitance between the signal lines SL and the touchrouting lines TL in the non-active area NA.

The shielding electrode SE may overlap at least partially with thesignal lines SL, and may be disposed in an area including an area wherethe signal lines SL and the touch routing lines TL overlap with eachother.

The shielding electrode SE may be disposed to surround the outerperiphery of the active area AA, and at least a part of the shieldingelectrode SE may be located inside the boundary of the active area AA.Alternatively, the shieling electrode SE may be disposed outside theactive area AA, apart from the boundary of the active area AA.

That is, as the shielding electrode SE is disposed to surround theactive area AA, overlapping with the area where the touch routing linesTL overlap with the signal lines SL, the effects of noise caused by thesignal lines SL on the touch routing lines SL may be reduced.

Further, while the shielding electrode SE may be an electrode disposedseparately for noise shielding in the non-active area NA of the displaypanel DISP, the shielding electrode SE may be an electrode disposed inthe non-active area NA of the display panel DISP, to which a constantvoltage is applied.

For example, the shielding electrode SE may be disposed in thenon-active region NA, electrically coupled to the second electrodes E2of the light emitting elements ED disposed in the active area AA.Further, the shielding electrode SE may be electrically coupled to acommon voltage supply line CVL that supplies a common voltage being thebase voltage VSS to the second electrodes E2.

That is, the shielding electrode SE may be connected between the secondelectrodes E2 which are the common electrodes of the light emittingelements ED and the common voltage supply line CVL, and disposed betweenthe layer on which the signal lines SL are disposed and the layer onwhich the touch routing lines TL are disposed.

As such, the shielding electrode SE coupled to the common voltage supplyline CVL is disposed on the signal lines SL to supply the common voltageto the common electrodes disposed in the active area AA. Therefore, theeffects of noise caused by the signal lines SL on the touch routinglines TL positioned on the shielding electrode SE may be reduced.

Therefore, the shielding electrode SE may offer the benefit of obviatingthe need for disposing an additional electrode to shield noise caused bythe signal lines SL.

Further, the common voltage supply line CVL connected to the shieldingelectrode SE may be located in the same layer as any one of the signallines SL disposed under the shielding electrode SE.

Further, the common voltage supply line CVL may be located outside theother signal lines SL in the non-active area NA in order to make theshielding electrode SE overlap with the arrangement area of the signallines SL.

FIGS. 13A, 13B, 14, and 15 are diagrams illustrating exemplarycross-sectional structures in which the shielding electrode SE isdisposed in the touch display device illustrated in FIG. 12.

Referring to FIGS. 13A and 13B, a multi-buffer layer MB and an activebuffer layer AB may be disposed on the substrate SUB, and an activelayer ACT may be disposed on the active buffer layer AB. A gateinsulation layer GI may be disposed on the active layer ACT, and a firstmetal M1 may be disposed on the gate insulation layer GI. The firstmetal M1 may be a gate metal.

A first insulation layer INS1 may be disposed on the first metal M1, anda second metal M2 and a second insulation layer INS2 may be sequentiallydisposed on the first insulation layer INS1. The second metal M2 may bean electrode for forming a capacitor.

A third metal M3 and the planarization layer PLN may be sequentiallydisposed on the second insulation layer INS2. The third metal M3 may bea source/drain metal.

The first electrode E1 constituting a pixel electrode PXL of eachsubpixel SP may be disposed on the planarization layer PLN, the lightemitting layer EL and a bank BANK may be disposed on the first electrodeE1, and the second electrode E2, which is a common electrode COM, may bedisposed.

The encapsulation portion ENCAP may be disposed on the second electrodeE2, and the touch electrodes TE and the touch routing lines TL may bedisposed on the encapsulation portion ENCAP.

In this case, the shielding electrode SE may be disposed between a layeron which the touch routing lines TL are disposed and a layer on whichsignal lines SL are disposed in the non-active area NA. For example, theshielding electrode SE may be disposed between the planarization layerPLN and the encapsulation portion ENCAP. That is, the shieldingelectrode SE may be disposed in the same layer as the pixel electrodePXL constituting the first electrode E1 of the light emitting elementED. Further, the shielding electrode SE may be formed of the samematerial as the pixel electrode PXL.

The shielding electrode SE may be electrically coupled between thesecond electrode E2, which is the common electrode COM, and the commonvoltage supply line CVL.

The common voltage supply line CVL may be disposed in the same layer asthe third metal M3 disposed on the uppermost layer of the signal linesSL positioned under the shielding electrode SE.

The common voltage supply line CVL may be disposed outside a pluralityof signal lines SL disposed in the non-active area NA.

That is, the common voltage supply line CVL may be disposed on theoutermost side of the signal lines arranged in the non-active area NA,and the plurality of signal lines SL located under the encapsulationportion ENCAP may be disposed between the active area AA and the commonvoltage supply line CVL.

Therefore, as the shielding electrode SE is disposed to surround thesignal lines SL on the plurality of signal lines SL, the shieldingelectrode SE may prevent formation of parasitic capacitance between thesignal lines SL and the touch routing lines TL. Further, the effects ofnoise caused by the signal lines SL on the touch routing lines TL may bereduced.

Further, since a constant voltage such as a common voltage is applied tothe shielding electrode SE, the shielding electrode SE may block noisecaused by the signal lines SL and may not affect the touch routing linesTL disposed on the encapsulation portion ENCAP.

The encapsulation portion ENCAP on the shielding electrode SE mayinclude a flat area and an inclined area, as illustrated in FIG. 13A.The encapsulation portion ENCAP may include the inclined area in anouter area of the non-active area NA, and the shielding electrode SE mayalso be disposed under the inclined area of the encapsulation portionENCAP, thereby blocking noise caused by the signal lines SL.Alternatively, as illustrated in FIG. 13B, the encapsulation portionENCAP may be disposed in a flat structure on the shielding electrode SE,so that the touch routing lines TL are kept apart from the shieldingelectrode SE by a predetermined distance on the area where the shieldingelectrode SE is disposed. Accordingly, the indirect effects of noisecaused by the signal lines SL on the touch routing lines TL through theshielding electrode SE may also be prevented.

The common voltage supply line CVL coupled to the shielding electrode SEmay be in the same layer as a signal line SL other than the third metalM3 disposed in the non-active area NA.

For example, referring to FIG. 14, the common voltage supply line CVLwhich is disposed in the non-active area NA and electrically coupled tothe shielding electrode SE may be located in the same layer as thesecond metal M2 under the shielding electrode SE. Further, the commonvoltage supply line CVL may be formed of the same material as the secondmetal M2.

The common voltage supply line CVL may be disposed outside the othersignal lines SL in the non-active area NA. Therefore, the shieldingelectrode SE electrically coupled between the common voltage supply lineCVL and the common electrode COM may cover an area in which a pluralityof signal lines SL are disposed.

As the common voltage supply line CVL is formed of the second metal M2under the third metal M3, a signal line SL formed of the third metal M3may be positioned on the common voltage supply line CVL. Accordingly,the shielding electrode SE extended to be coupled to the common voltagesupply line CVL may be positioned on one side of the signal line SLformed of the third metal M3.

That is, the shielding electrode SE may include a first part SEapositioned on a signal line SL and a second part SEb positioned on oneside of the signal line SL.

As the shielding electrode SE is disposed on one side of the signal lineSL, the shielding electrode SE may also prevent the signal line SL fromforming parasitic capacitance in a slanted direction with respect to thetouch routing lines TL.

Therefore, the shielding electrode SE may further reduce noise caused byparasitic capacitance between the signal lines SL and the touch routinglines TL.

In another example, referring to FIG. 15, the common voltage supply lineCVL electrically coupled to the shielding electrode SE may be disposedin the same layer as the first metal M1. Further, the common voltagesupply line CVL may be formed of the same material as the first metalM1.

As the common voltage supply line CVL is positioned in the same layer asthe first metal M1 disposed on the lowest layer of a plurality of signallines SL under the shielding electrode SE, the shielding electrode SEelectrically coupled to the common voltage supply line CVL may surroundthe plurality of signal lines SL as a whole.

Therefore, the noise shielding performance of the shielding electrode SEagainst the signal lines SL may further be increased.

That is, embodiments of the present disclosure provide a structure inwhich the shielding electrode SE may shield noise caused by the signallines SL by disposing the shielding electrode SE electrically coupledbetween the common electrode COM and the common voltage supply line CVLand positioning the plurality of signal lines SL inward of the commonvoltage supply line CVL.

Accordingly, the touch routing lines TL on the shielding electrode SEare not affected by the signal lines SL, thereby improving touch sensingperformance.

Further, the common voltage supply line CVL coupled to the shieldingelectrode SE may provide the noise shielding function in some cases.

FIG. 16 is a diagram illustrating another exemplary cross-sectionstructure of the touch display device in which the shielding electrodeSE is disposed according to embodiments of the present disclosure.

Referring to FIG. 16, the shielding electrode SE electrically coupled tothe common voltage supply line CVL may be disposed under theencapsulation portion ENCAP in the non-active area NA. This shieldingelectrode SE may reduce noise caused by the signal lines SL under theshielding electrode SE from affecting the touch routing lines TL on theencapsulation portion ENCAP.

The shielding electrode SE may be electrically coupled to the commonvoltage supply line CVL supplying a common voltage.

The common voltage supply line CVL may be disposed in the same layer as,for example, the third metal M3. Further, the common voltage supply lineCVL may be formed of the same material as the third metal M3.

The width (or area) of the common voltage supply line CVL may be largerthan the widths (or areas) of the other signal lines SL.

That is, among a plurality of signal lines SL disposed in the non-activearea NA, the width of the common voltage supply line CVL coupled to theshielding electrode SE and supplying the common voltage may be largerthan that of any other signal line SL.

The common voltage supply line CVL may overlap with other signal linesSL under the common voltage supply line CVL.

Therefore, the common voltage supply line CVL may block noise caused bythe underlying signal lines SL from affecting the touch routing lines TLon the encapsulation portion ENCAP.

Further, as the width of the common voltage supply line CVL increases,the resistance of the lines may be reduced.

While the common voltage supply line CVL providing the noise shieldingfunction is shown as disposed in the same layer as the third metal M3 byway of example, the common voltage supply line CVL may be disposed inthe same layer as the first metal M1 or the second metal M2, whileproviding the noise shielding function.

That is, embodiments of the present disclosure may improve touch sensingperformance by disposing the shielding electrode SE, which is positionedin the non-active area NA and electrically coupled to the commonelectrode COM, or the common voltage supply line CVL coupled to theshielding electrode SE between the signal lines SL and the touch routinglines TL and shielding noise caused by the signal lines SL.

Further, besides the shielding electrode SE, an additional electrode fornoise shielding may be disposed in some cases.

FIG. 17 is a diagram illustrating another exemplary cross-sectionstructure of the touch display device in which the shielding electrodeSE is disposed according to embodiments of the present disclosure.

Referring to FIG. 17, a first shielding electrode SE1 may be disposed tobe electrically coupled between the common electrode COM and the commonvoltage supply line CVL in the non-active area NA. The first shieldingelectrode SE1 may be located between layers in which touch routing linesTL are disposed and layers in which a plurality of signal lines SL aredisposed.

A second shielding electrode SE2 may be disposed separately from thefirst shielding electrode SE1, outside the first shielding electrode SE1in the non-active area NA.

The second shielding electrode SE2 may be disposed in the same layer as,for example, the third metal M3 disposed on the uppermost layer. Thesecond shielding electrode SE2 may be formed of the same material as thethird metal M3.

The second shielding electrode SE2 may be disposed outside the firstshielding electrode SE1, that is, outside the common voltage supply lineCVL, overlapping with a signal line SL positioned outside the commonvoltage supply line CVL.

Therefore, the second shielding electrode SE2 disposed separately fromthe first shielding electrode SE1 may shield noise caused by the signallines SL, while covering an area which the first shielding electrode SE1does not cover. As such, the common voltage supply line CVL may beextended to a part of the non-active area NA or the second shieldingelectrode SE2 may be formed of a metal positioned in a lower layer thanthe first shielding electrode SE1, thereby shielding noise caused by thesignal lines SL. Because the extended common voltage supply line CVL orthe second shielding electrode SE2 is located in a lower layer than theshielding electrode SE coupled to the common electrode COM or the firstshielding electrode SE1, the extended common voltage supply line CVL orthe second shielding electrode SE2 may be disposed in correspondencewith the inclined area of the encapsulation portion ENCAP. That is, thedistance between the shielding electrode SE and the touch routing linesTL may be kept to be a certain distance or larger by disposing theelectrode for noise shielding in the inclined area of the encapsulationportion ENCAP in a lower layer than the electrode for noise shielding inthe flat area of the encapsulation portion ENCAP. Therefore, noisecaused by the signal lines SL may not indirectly affect the touchrouting lines TL through the shielding electrode SE.

Further, when the second shielding electrode SE2 is disposed separatelyfrom the first shielding electrode SE1, the touch routing lines TL donot overlap with the signal lines SL in an area overlapping with thearea between the first shielding electrode SE1 and the second shieldingelectrode SE2. Therefore, generation of noise from the signal lines SLmay be reduced in an area which is not covered by the first shieldingelectrode SE1 and the second shielding electrode SE2.

A constant voltage may be applied to the second shielding electrode SE2.Alternatively, the same voltage as the common voltage applied to thefirst shielding electrode SE1 may be applied to the second shieldingelectrode SE2. In this case, a power source supplying the common voltageto the second shielding electrode SE2 may be identical to or separatedfrom a power source supplying the common voltage to the first shieldingelectrode SE1.

Alternatively, the same signal as applied to the touch routing lines TLmay be applied to the second shielding electrode SE2 in some cases. Asthe same signal as applied to the touch routing lines TL is applied tothe second shielding electrode SE2, noise caused by the signal lines SLmay be blocked and noise caused by parasitic capacitance between thesecond shielding electrode SE2 and the touch routing lines TL may alsobe prevented.

While the second shielding electrode SE2 may be disposed in the samelayer as the common voltage supply line CVL coupled to the firstshielding electrode SE1 as in the example of FIG. 17, the secondshielding electrode SE2 may be disposed in a different layer from thecommon voltage supply line CVL.

For example, the second shielding electrode SE2 may be disposed in ahigher layer than the common voltage supply line CVL.

In this case, the signal lines SL and the touch routing lines TL mayfurther reduce an area in which overlap may occur in a slanteddirection, thereby increasing the effect of noise shielding.

In another example, the second shielding electrode SE2 may be disposedin a lower layer than the common voltage supply line CVL. In some cases,a part of the second shielding electrode SE2 may be extended into thecommon voltage supply line CVL and thus increase a noise shielding area.

As described above, embodiments of the present disclosure may reducenoise caused by the signal lines SL from affecting the touch routinglines TL in an area which is not covered by the shielding electrode SEby additionally disposing an electrode for noise shielding in additionto the shielding electrode SE coupled between the common electrode COMand the common voltage supply line CVL.

Alternatively, the touch routing lines TL may be disposed withoutoverlapping with the signal lines SL in the area which is not covered bythe shielding electrode SE, so that the signal lines SL do not generatenoise in the area in which the shielding electrode SE is not disposed.

FIG. 18 is a diagram illustrating another exemplary plane structure ofthe touch display device in which the shielding electrode SE is disposedaccording to embodiments of the present disclosure. FIG. 19 is a diagramillustrating an exemplary cross-section structure of the touch displaydevice in which the shielding electrode SE is disposed, illustrated inFIG. 18.

Referring to FIGS. 18 and 19, the touch display device may include afirst non-active area NA1 with the shielding electrode SE disposedtherein and a second non-active area NA2 without the shielding electrodeSE in the non-active area NA in some cases.

In this case, touch routing lines TL located in the first non-activearea NA1 with the shielding electrode SE may partially overlap withsignal lines SL located under the shielding electrode SE.

Even though the touch routing lines TL overlap with the signal lines SL,the existence of the shielding electrode SE between the touch routinglines TL and the signal lines SL may block noise caused by the signallines SL.

Touch routing lines TL disposed in the second non-active area NA2without any shielding electrode SE may be disposed without overlappingwith signal lines SL.

That is, the touch routing lines TL may be disposed in an area otherthan an area overlapping with the area in which the signal lines SL aredisposed, in the area without any shielding electrode SE.

As described above, the overlap structure between the touch routinglines TL and the signal lines SL is allowed in the area with theshielding electrode SE disposed therein, and the touch routing lines TLdo not overlap with the signal lines SL in the area without anyshielding electrode SE, in the non-active area NA. Therefore, noisecaused by the signal lines may be reduced and the freedom of line designmay be increased.

According to the above-described embodiments of the present disclosure,a shielding electrode SE, which is disposed in a non-active area NA andelectrically coupled between a common electrode COM and a common voltagesupply line CVL, is located between a touch routing line TL and a signalline SL. Therefore, an electrode disposed for supplying a common voltagemay provide the function of shielding noise caused by the signal lineSL.

Further, the width (or area) of the common voltage supply line CVL maybe increased or an electrode which is not coupled to the common voltagesupply line CVL may be additionally disposed in some cases, therebyshielding noise from the signal line SL.

In this manner, the electrode, which is disposed in the non-active areaNA and to which a constant voltage is applied, is located between thetouch routing line TL and the signal line SL. Therefore, the effects ofnoise caused by the signal line SL on the touch routing line TL may bereduced.

Further, an encapsulation portion ENCAP located on the shieldingelectrode SE has a planarized structure. The resulting maintenance of acertain distance between the shielding electrode SE and the touchrouting line TL may reduce indirect noise from affecting the touchrouting line TL through the shielding electrode SE.

The above description has been presented to enable any person skilled inthe art to make and use the technical idea of the present invention, andhas been provided in the context of a particular application and itsrequirements. Various modifications, additions and substitutions to thedescribed embodiments will be readily apparent to those skilled in theart, and the general principles defined herein may be applied to otherembodiments and applications without departing from the spirit and scopeof the present invention. The above description and the accompanyingdrawings provide an example of the technical idea of the presentinvention for illustrative purposes only. That is, the disclosedembodiments are intended to illustrate the scope of the technical ideaof the present invention. Thus, the scope of the present invention isnot limited to the embodiments shown, but is to be accorded the widestscope consistent with the claims. The scope of protection of the presentinvention should be construed based on the following claims, and alltechnical ideas within the scope of equivalents thereof should beconstrued as being included within the scope of the present invention.

What is claimed is:
 1. A touch display device comprising: an active areain which a plurality of light emitting elements are disposed; anon-active area defined outside of the active area, in which a pluralityof signal lines are disposed; an encapsulation portion disposed in theactive area and the non-active area and located on the plurality oflight emitting elements and the plurality of signal lines; a pluralityof touch electrodes disposed in the active area on the encapsulationportion; a plurality of touch routing lines disposed in the non-activearea on the encapsulation portion and electrically coupled to theplurality of touch electrodes; a shielding electrode located under theencapsulation portion in the non-active area, with at least a partthereof located on the plurality of signal lines, and electricallycoupled to a common electrode of the plurality of light emittingelements; and a common voltage supply line located under the shieldingelectrode and electrically coupled to the shielding electrode, whereinat least one of the shielding electrode or the common voltage supplyline is disposed in an area including an area in which the plurality oftouch routing lines overlap with the plurality of signal lines in thenon-active area.
 2. The touch display device according to claim 1,wherein the plurality of signal lines are located between the activearea and the common voltage supply line.
 3. The touch display deviceaccording to claim 1, wherein at least one of the plurality of signallines is disposed in an area overlapping with the common voltage supplyline.
 4. The touch display device according to claim 3, wherein a widthof the common voltage supply line is larger than a width of the at leastone of the plurality of signal lines overlapping with the common voltagesupply line.
 5. The touch display device according to claim 1, whereinthe shielding electrode includes: a first part located on the pluralityof signal lines; and a second part connected to the first part andlocated on one side of at least one of the plurality of signal lines. 6.The touch display device according to claim 1, wherein the shieldingelectrode is formed of a same material as pixel electrodes of theplurality of light emitting elements.
 7. The touch display deviceaccording to claim 1, wherein the common voltage supply line is disposedin a same layer as one of the plurality of signal lines.
 8. The touchdisplay device according to claim 7, wherein the common voltage supplyline is disposed in a same layer as a signal line from the plurality ofsignal lines at a lowest position among the plurality of signal lines.9. The touch display device according to claim 1, wherein a part of theplurality of signal lines, disposed in an area other than an areaoverlapping with the shielding electrode and the common voltage supplyline, is disposed in an area other than an area overlapping with theplurality of touch routing lines.
 10. The touch display device accordingto claim 1, wherein at least a part of the encapsulation portion,disposed in the non-active area, includes an inclined surface, and apart of the plurality of touch routing lines are disposed on theinclined surface.
 11. The touch display device according to claim 1,wherein a top surface of the encapsulation portion overlapping with theshielding electrode in the non-active area is flat.
 12. A touch displaydevice comprising: an active area in which a plurality of light emittingelements are disposed; a non-active area defined outside of the activearea, in which a plurality of signal lines are disposed; anencapsulation portion disposed in the active area and the non-activearea and located on the plurality of light emitting elements and theplurality of signal lines; a plurality of touch electrodes disposed inthe active area on the encapsulation portion; a plurality of touchrouting lines disposed in the non-active area on the encapsulationportion and electrically coupled to the plurality of touch electrodes; afirst shielding electrode located under the encapsulation portion in thenon-active area, with at least a part thereof located on the pluralityof signal lines, and electrically coupled to a common electrode of theplurality of light emitting elements; and a second shielding electrodelocated outside the first shielding electrode in the non-active area andseparated from the first shielding electrode.
 13. The touch displaydevice according to claim 12, wherein at least one of the firstshielding electrode or the second shielding electrode is disposed in anarea including an area in which the plurality of touch routing linesoverlap with the plurality of signal lines in the non-active area. 14.The touch display device according to claim 12, wherein the firstshielding electrode and the second shielding electrode are isolated fromeach other.
 15. The touch display device according to claim 12, whereina constant voltage is applied to the second shielding electrode.
 16. Thetouch display device according to claim 12, wherein a voltage is appliedto the second shielding electrode at a same level as a voltage appliedto the first shielding electrode.
 17. The touch display device accordingto claim 12, wherein a same signal as applied to the plurality of touchrouting lines is applied to the second shielding electrode.
 18. Thetouch display device according to claim 12, further comprising a commonvoltage supply line located under the first shielding electrode andelectrically coupled to the first shielding electrode, wherein thecommon voltage supply line is located in the same layer as the secondshielding electrode or under the second shielding electrode.
 19. Thetouch display device according to claim 18, wherein an area overlappedbetween the plurality of touch routing lines and the plurality of signallines overlaps with an area other than an area between the commonvoltage supply line and the second shielding electrode in the non-activearea.
 20. The touch display device according to claim 12, wherein a partof the encapsulation portion, located on the first shielding electrode,includes a flat area, and a part of the encapsulation portion, locatedon the second shielding electrode, includes an inclined area.